The True History Behind St. Patrick’s Day | TIME

Here’s what we know about the real St. Patrick

The modern St. Patrick’s Day celebrations that will take place on Thursday, at least in the United States, will likely be characterized by commercial lucky charms and green beer—all of which has very little to do with the historical figure of the saint. As it turns out, it took centuries for the holiday to accrue the elements that now seem crucial to its celebrations.

Legend says St. Patrick was actually born Maewyn Succat, but that he changed his name to Patricius (or Patrick), which derives from the Latin term for “father figure,” after he became a priest. And that supposed luck of his is the root of all the themed merchandise for modern St. Patrick’s Day.